Pump



Feb., 22, i949.

C. A. .ERICKSON PUMP Filed June 14, 1944 Patented Feb. 22, 1949 UNITED STATES ATENT oFFlcE (Cl. 10S-150) 12 Claims.

This invention relates to a pump and partcularly to a pump designed for supplying fuel to aan internal combustion engine. It has for one object to form a pump of diaphragm type in lwhich the pressure dome is inclined in a unitary ghousing.

Another object is to provide a pump having an adequate outlet valve in which the likelihood of clogging is reduced to a minimum.

, Another object is to provide a pump, the parts t of whichare silent.

A further object is to provide a pump formed ,of severalseparable parts arranged to be secured @together without the use of bolts or screws.

@ther objects will appear from time to time .throughout :the specification and claims.

This invention is ,illustrated more or less diagrammatcallyin tlieflpelyng drawings wherein:

Figure 1 is a .eide elevati@ Off 'the fimplete pump with the driving member shown in section;

Figure 2 is a vertieai.Se.Cii9.,111-Wlth vPartsinl.- vation;

Figure 3 is a sectional detail of Figure 2; and

Figure 4 is a side elevation of a modified Lform of pump, with parts in section; and t Figure 5 is a detailed section, on an enlarged scale, of the valve seats and valves.

Like parts are indicated by like characters throughout the specication and the drawings.

The housing is preferably formed of two main members which may be cast or otherwise produced. As shown, the housing comprises an upl per portion I. An opening 2 is formed in the .upper end of the housing portion I. An internal and preferably annular wall 3 is positioned inwardly of the outer wall housing I, and the two 1 form together a space 4 of annular shape which ,comprises a pressure dome or pressure space. In i the particular form shown in Figures 1 and 2, the upper end of the housing is closed by a member 5 which has a threaded inlet opening E suitable or connection to a source of supply. It may Lhave a depression 'I in its upper end adapted to ihave seated in it a locking and adjusting screw ,18 which is engaged in a bearing 9 fixed in a bail I0.

The bail is provided with two inwardly turned Aends Il, the operation of which will be described below. The member 5 is seated in the opening V2 of the housing l, and a sealing gasket or other leak preventing member I2 may be positioned Abetween them. A screen I3 may be positioned fwithin the inner space defined by the annular `receive screws or wall 3. An outlet opening I4 is formed in the housing I and may terminate in a threaded portion I5 suitable for receiving an outlet pipe. The seat member for the inlet and outlet valves comprises a ring-like member having a lower portion I6 which may be seated against a stop portion il formed in the housing i.

A sealing gasket I8 may be positioned between the two, if desired. Integral with the member Il is a raised portion I9 which is provided with a plurality of periorations 22. Integral with the portion I9 is an upwardly extending portion 2| which has formed integrally with it an inwardly extending flange 22 which serves as a seat for the inlet valve. Fixed to the portion 2l is a ilange 23 which extends rom the annular` member 24. This member is notched, as at 25. Positioned about the portion 24 is a spring 26 which contacts the under side of a valve member 2'I. A spring abutment 23 is formed as a part of an annular member 29 which is secured to the portion 2l. A valve 3l? is formed as a ring and is positioned to close the valve openings 2t in the member I9. A spring 3l normally holds the valve seated. The member 29 and the portion 2l dene'an a'niiula'r'channel receiving a sealing ring 29a which seals the' lower end of the inner wall 3. In the form shown in Figures 1, 2 and 4, the housing is 'formed of two main members. They are the samerexcept that in' the forms of-Figures l and `2 a groove is formed in the upper part of the lower housing member to be engaged bythe points II of the bail'l. 'In the form of Figure '4 the groove is formed in the lower part of the upper housing. The lower housing member is designated generally by the numeral 32. It is generally rounded in cross section and is provided with an upstanding edge 33 around and adjacent which is formed a groove 32. This groove may extend substantially about the housing or may be interrupted, so long as it is of sufficient extent to provide a point of engagement with the bail ends i I.

Within the housing member 32 is formed a depression or annular groove-like member 35 within which one or more diaphragm-operating springs 35 may be positioned. A lateral extension 3l is formed as a part of the housing member 32, and it is provided with a laterally extending iiange 38 which is perforated, as at 39, 39, to bolts by means of which the pump may be fastened to a support. A pumpoperating lever 4I) is movably mounted within the lateral extension 3l, and it is supported on a Y it may be conveniently mounted on the 3 bearing member 4i which is bolted by Va bolt 42 to a portion of the ange 38.

At its outer end the lever 40 has a cup-like portion 43 which may have within it a cushioning or sound-deadening member 44 against which the upper end of the lever-operating means 45 is seated.I At itsdopposite end the lever 4 0 isy provided .witha'round'ed portion 46 vwhich may be surrounded by a cushioning member 47 which may be of synthetic rubber or other cushioning' and sound-deadening material.

A diaphragm 48 is positioned between the two' housing members I and 32 and itsedge or periphery is engaged between these members.=` .Gaskets or packings 49 may be positioned abouttheedges of the diaphragm 48 and betweenthose edges and the adjacent portions of the' housings l andv 32. An upper stiiening plate 50 may besecured above the diaphragm and a lower stiienng plate tmay be secured below itk A stirrup-like member. 522.15 secured to thediaphragm orL totrredia.; phragm-reniorcng members,. The plates. 50,. 5! andathestirrup/SZ, may conveniently be secured irr-.izrhicebyarivetzt.Y`V .Y ,Y t Y As.. shown in rEigures 13nd, 2 .that end of the lever 40 which is surroundedby the cushioning material 4.1. is; positioned. .Within and. thelfOre engagesor; is adaptedutodengage the `st i'rrup 52.

a. ,theimodiiiedforrn'of Eigure the only difference is iin thelvcaton 0f the .,bil andy the reierence numerals areapplived to the bail each case-.Erbe ,adjusting 4scrtafp? Qf the bail `is posi-fYY tiene@ or .Centered-.11i aidepressidri 54 omed' in the lowerndlef the, lowerhuine 32 and the of the' aihare positioned in a ugroove h. is formed about the lower end or edge .riventiouarlt 11. illy changes.. .in4 the form, .shape and arrangement f parts can' be made .with e ut departing from 'the spirit olf, the on, diy'shojwi fg is th reigreftfbetalen as,` in a jsefis'e,` diagramin 4vic;

varietyoiA gasket4 constructions. v 'The `invention "ot limited'to any particular gasket arrangeinent. 'Ihave poiritdeutgaskets 49 `as hewn .iiyjlgure 1,7aridthese might or might not be present. AlsoQ gaskets may be present at'orie or another of the points o f contact between the valve 'cage and the inner Wall 3 of the vapor donie. In general; of icourse, :the construction is 'such either with or without'gaskets as to preventl the leakage of liquid from one partof the pump to another and to compel such liquid to flow along the proper andpredetermined paths. rThe use and operation of this invention are `as followsz.. t t, .e ..It is. assembled asl shown .and is .mountedon any suitab1e..support adjacent-a powcrmensffor operating the. The pump as alpove men,- `vtioziegi hasone particularapp'lication in which it ,is sedzas a `fuelpum l,for furnishing fuel 'toen mueran.qpippgtiongenene.. (when the housing or'adjacent it and is driven from some part of the engine which operates it. The driving member rises and falls and through it moves the lever. The lever by means of the stirrup constructions pulls the diaphragm down with the resistance of the spring or springs positioned adjacent the diaphragm anrbiasedf normally to riseit.. when the diapirmf is etilqf downward by the operation of the lever suction is .created within the chamber above the diaphragm and the inlet valve is opened against the resistance of the spring which is biased to hold it closed@ l'luid issthus drawn into the pump housingV through the inlet valve and into the chamber below the inletV valve and above the diaphragm. Whenktheleverprises to permit the spring or springs' to" raise'Y the diaphragm, the pressure which ,is created in the chamber above the diaphragm closes the inlet valve and opens the outlet valve against,`

conliebt'iOS, .l

The' member 2s aereas gemeen-farmi* v liquid as. it mOi/.esimo andthe bail is nostpn, adjacent one Yoft trie" likalgilge .portire diameter of the device is not increased since that is determined by the diameter of the diaphragm. If the pressure dome were positioned above the housing it would cause an increase in the overall height of the device and hence by forming the pressure dome as it is formed in the present invention the overall dimensions of the pump are reduced. rllhe construction also reduced the number of parts used and hence reduces the amount of work required to accomplish assembly.

I claim:

1. A pump, comprising a plurality of housing members, one of said housing members having an external and an internal wall and deining an inlet passage and an outlet passage, the two walls being concentric and deiining between themselves an annular pressure dome communicating with said outlet passage, an inlet valve and a seat therefor, a stop member adjacent said inlet valve, a spring biased normally to hold said inlet valve seated, an outlet valve seat, an outlet valve, a spring bia-sed to hold said outlet valve seated and a diaphragm positioned between said housing members and having its periphery rmly gripped by said housing members, a spring biased to move said diaphragm in one direction, and means for moving said diaphragm in the opposite direction.

2. A pump, comprising a plurality of housing members, one of said housing members having an external and an internal wall and defining an inlet passage and an outlet passage, the two walls being concentric and defining between themselves an annular pressure dome communicating with said outlet passage, an inlet valve and a seat therefor, a stop member adjacent said inlet valve, a spring biased normally to hold said inlet valve seated, an outlet valve seat, having a plurality of openings in it, an outlet valve annu lar in shape, a spring biased to hold said valve seated and a diaphragm positioned between said housing members and having its periphery firmly gripped by said housing members, a spring bia-sed to move said diaphragm in one direction, and means for moving said diaphragm in the opposite direction.

3. A pump, comprising a plurality of housing members, one of said housing members having an external and an internal wall, the two walls denning between themselves an annular pressure dome, an inlet valve and a seat therefor, a stop member adjacent said inlet valve, a spring biased normally to hold said inlet valve seated, an outlet valve seat, an outlet valve, a baiile positioned adjacent the entrance end of said pressure dome, a spring biased to hold said outlet valve seated and bearing at one end against said baille, a diaphragm positioned between said housing members and having its periphery iirmly gripped by said housing members, a spring biased to move said diaphragm in one direction, and means for moving said diaphragm in the opposite direction.

4. A pump, comprising a plurality of housing members, one of said housing members having an external and an internal wall and deiining an inlet passage and an outlet passage, the two walls being concentric and dening between themselves an annular pressure dome communicating with said outlet passage, an inlet valve and a seat therefor positioned within the inner wall, a stop member adjacent said inl-et valve, a spring biased normally to hold said inlet valve seated, an outlet valve seat, having a plurality of openings in it, an outlet valve annular in shape, a spring biased to hold said valve seated and a diaphragm positioned between said housing members, a

spring biased to move said diaphragm in one di.

rection, and means for moving said diaphragm in the opposite direction.

5. A pump, comprising a plurality of housing members, one of said housing members having an external and an internal wall, the two walls defining between themselves an annular pressure dome, an inlet valve and a seat therefor posi-v tioned within the inner wall, a stop member ad-l jacent said inlet valve, a spring biased normally to hold said inlet valve seated, an outlet valve seat, having a plurality of openings in it, an outlet valve annular in shape, a baiile positioned adjacent the entrance end of said pressure dome,

a spring biased to hold said outlet valve seated and bearing at one end against said baille, a diaphragm positioned between said housing members and having its periphery firmly gripped by said housing members, a spring biased to move said diaphragm in one direction, and means for moving said diaphragm in the opposite direction.

6. In combination, in a pump, two housing members, means for joining them together, said housing members when joined comprising the entire housing element for a pump system including a pressure dome, one of said housing members shaped to provide an inlet passage and shaped to provide two walls with an annular pressure dome, a screen positioned in said inlet passage, means providing an inlet valve adjacent said passage, means for providing an annular seat for said valve, an annular stop for said inlet valve, said annular stop being notched to provide inlet apertures and a spring supported by said annular member and biased to hold the valve closed, an annular outlet valve seat, a plurality of outlet openings in said seat, an annular valve adapted to be seated on said seat, a baille in the liquid flowing through said outlet valve and positioned to baille liquid away from said pressure dome and a spring bearing against said Outlet valve and against said baille and biased to hold said outlet valve seated, pumping means comprising a diaphragm, and a plurality of springs biased to move said :diaphragm in one direction and a linkage adapted to move said diaphragm in the opposite direction against the resistance oi said spring, said linkage-describing a stirrup like member adapted to said diaphragm, a rigid unitary lever, a bearing for said lever supported by one of said housing members, said lever adapted to penetrate into said stirrup, said lever leaving cushioning means between it and said stirrup and a lever driving member adapted to be moved to move said lever, cushioning means being positioned between said lever and said driving mean-s.

'7. A fuel pump comprising a casing having an annular outer wall and an annular inner wall forming chambers one within the other, a valve plate extending across the outer chamber at one end, inlet and outlet valve means on the plate for controlling the flow of fuel between the chambers, means sealing the lower end of the inner chamber to the plate so as to prevent ow of fuel between the chambers except through said valve means, a pump diaphragm fastened to the casing below the plate for alternately reducing, and increasing the fuel pressure below the plate, a lter in the inner chamber through which the fuel must flow, means closing the chambers at their ends opposite the valve plate, and inlet and outlet fuel lines connected respectively to the chambers.

encaisse# fuel; puniin` vvalve assemblyvl cinprisi'ngrai valve plate. havingfacentral:opening: a=valve disk"VV adaptedito close;- the; opening, spring i means: noi'- mally urging the disk to.elosedpositioi'nf,thefdiskfv being;.arranged so that it opens under' pressure ofL fuel at onef-side oftheadisk-said plate having one'formore other: openingssspacedf'romA the -cen-v traly opening. a: ring platefffor' closingasaid: othery opening, spring: means-urging' the ringplate towards -closed' position, the ring platel being. ariranged; Sothat it opens underpressure of fuel..

at-:thefoth'er side-of the'. diskyand asealing ring-2 carredf by/ the platev intermediate said central openingand said oneformoreother' openings;

9i; Aiuel pump comprisingzaoasing having an' outer f annular WallT andf an vinner annular'f wall formingA chambers one. Within `the other, avalve plate extending: across the casing/and havingV its marginal portion; connectedto the outer wall; spring-pressed valvemeans: on. the plate for-a1- lowingiuel tolowthrougfhthe plate Ainone direc'- tionfromr oney chamber, spring pressed valve means on the plateV for allowing. fuel to flow through: the-plate inf the other` directionto the other: chamber, annular means 'sealing` theend ofi theinner chamberwall to the valveplate around onefofrthe' valve means; and= means forf eectingV a pumpl action to; force fuell from one ofsaid" chambers `to the other:

1G:A Ar; fuel pump comprising a casing` having anouterannular ii/allzandfanz` inner annular WallA forming;u chambers one i within the'` other,V a: valve platefextending acrossY the casing? and having itsy margirial portion' connected' to' the' outer wall,

' valve'means-onith'e platefor controlling `the flow of -fue-lY between the chambers, annular means sealing-the valveV` platev to the' Wallof' theinner chamber to'preventaow of fuel between the chambers" except 'through the 'valvemeans, and means for ei'ectingav pump actionstoforcefuel fromoneof said chambersto theotlier;

1l. A fuelpumpcomprisingL a casing having anY outerannularwall` and an inner annular Wall forming chambers one Wthini the' other, a valve platelextendingacross the easing andhaving' its marginalportion' connected to theI o'uterl Wall,`-

a diaphragmextending acrosssaid casingland-co'- operating with said-`plate-to dei-lne aY pumping space,A springV pressedlvalvel means oni the plate fon allowing fuel toflow through'the plate'in one directionirom one chamb'er'to said space; spring pressedr valve meanson the-plate for allowing" fueltofilow through theaplate" in the other'dire'otionff-rom said spacev to the=othen chamber, an-

means; and means 'forelctingi a= pumping action tosfor-ce fuel from`4 one off'saili chambers to the other throng-l" saidisp'ac'e.Y

12. Avv-fuelfpump comprising-'a casing having anannular outer-1 VWall and.' an annular inner wall formin'g chambers one-ninitl'iin the other, a-valveplate''fenterid-ingj acrns'slthef out'er chamber at cane` end, means supportedon Vsaid jplate and-including.;l inlet valve means and outlet valve means for contrellingltherflwioffuelthroughsaldi-plateand meanssea'ling said plate-to-saidannular inner 1 Wall betweenisaidil inleti valve means and' saidy outlet val-ve;y means l' toeprevent` ther flow' of" fuel'A between said' chambers except through saidvalve meansl: aipumpfdia-phifagm# extendingacross said" casiriglbelowfi the.- plate? for: alternatelyA reducing*- and:v increasing; thefuelfpressure below the plate; saidcas-ingain oluoling"` meansy closing# the Chamb ers" atthe'ii' end's loigip'ositeftlie:valve plate, said casing having??anA annular' downwardly presenting-` suriaoe'z externiingi:` ontiilardlyf'from the lower end of saiolioiitera'Wall, saidivalveA platefhavinea cylin-Y driealrportiontelescopieally received; in the lowerV enslf` of said annulanout'er wall and an' outwardlyV extendingY anger portion: registering' with said` annular surface on said casing, and annular sealingrmeans betweenrsaidplate and 'said casing. CHARLES-11A. ERICKSON.r

REEERENGES 1 CIT-ED?- 'Ifiiefoliowingreferences are of record in the el of this `lpatent 1 50 Number' (funtry' Date Great Britainv 1936 @rea/#Britain 1940' 

